By default, running PrepISO triggers a fresh scan of your entire external drive, which can take several minutes if you have hundreds of games.
When you run the tool normally, it may or wipe cache partitions. By holding the designated button/option during execution: Prepare Exfat Ntfs Drives 1.30 -hold To Keep Existing Cache
A single tool that can prepare both is invaluable for users who swap drives between a gaming PC (NTFS) and a media server (exFAT). By default, running PrepISO triggers a fresh scan